is priority mail first class is a question often asked by customers trying to understand USPS shipping options. While both are services offered by USPS, Priority Mail is a separate, faster, and slightly more expensive service than First-Class Mail. Priority Mail includes features like tracking and insurance, making it more suitable for packages over 13 ounces or higher-value items. E-commerce sellers must choose between these options based on product weight, delivery speed, and budget. Working with fulfillment centers that understand postal classifications and integrate carrier rate comparisons ensures cost-effective and timely shipping solutions for different order profiles.